MEXICO CITY—A roof that partly protected one of Mexico’s most important ancient sites collapsed under the weight of a major rain and hail storm late on Wednesday, causing minor damage to the ornate temple complex that once hosted the Aztec empire’s elite warriors. President Andres Manuel Lopez Obrador pledged on Thursday to repair any damages to the House of Eagles, which was covered by a large metal roof of modern construction that was toppled by the storm. The structure is adjacent to the ruins of the Aztecs’ holiest shrine, known as the Templo Mayor. Mexico’s culture ministry described damage to the ruins as “minor, recoverable and restorable” in a statement on Thursday, adding that removal of the collapsed roof will begin immediately. The House of Eagles features elaborately-carved relief sculptures along its walls and benches, depicting warriors in procession and blood-letting rituals. Remnants of its painted murals have remained visible …